Anyone driving the HD6XX with a Schiit Magni 3 HP amp? If so, what do you think? I currently listen on Hifiman HE400S cans which are 22 ohm. The 6XX's 300 ohm load and how it matches up with the Magni 3 has me a bit concerned. I'm hoping the Magni 3 can drive the 6XX's well for Jazz/Fusion and Classic Rock listening.
Thanks!!

Magni 3 is able to drive the 6XX more than enough... in term of loudness.
When it come to musical and technical aspect, the 6XX probably benefit more from faster solid state (example: Jotunheim) or tube amp (Vali 2, Massdrop CTH, Bottlehead Crack...).
Still, at this point, i think there's no amp could beat Magni 3 for around $100 (definitely not the O2). That might change in the next month though, when the Cavalli Liquid Spark released.